source: xtideuniversalbios/trunk/Assembly_Library/Inc/Display.inc@ 66

Last change on this file since 66 was 52, checked in by Tomi Tilli, 14 years ago

Changes to Assembly Library:
Completely rewritten line splitting (slower but no need to modify string).
Some changes to string processing functions.
Saved few bytes from CGA detection.
File size: 8.5 KB
Line 
1; File name : Display.inc
2; Project name : AssemblyLibrary
3; Created date : 25.6.2010
4; Last update : 11.10.2010
5; Author : Tomi Tilli
6; Description : Defines for display library.
7%ifndef DISPLAY_INC
8%define DISPLAY_INC
9
10;--------------------------------------------------------------------
11; Display Library users need to use this macro since it will provide
12; compatibility with future library versions.
13;
14; CALL_DISPLAY_LIBRARY
15; Parameters:
16; %1: Function to call (functionName from DISPLAY_LIB)
17; Registers: Depends on function to call
18; Returns:
19; Depends on function to call
20; Corrupts registers:
21; AX (unless used as a return register), DI
22;--------------------------------------------------------------------
23%macro CALL_DISPLAY_LIBRARY 1
24 %ifidn %1, PushDisplayContext
25 call DisplayContext_Push
26 %elifidn %1, PopDisplayContext
27 call DisplayContext_Pop
28 %elifidn %1, PrepareOffScreenBufferInESBXwithLengthInCX
29 call DisplayContext_PrepareOffScreenBufferInESBXwithLengthInCX
30 %else
31 mov di, DISPLAY_LIB.%1
32 call Display_FunctionFromDI
33 %endif
34%endmacro
35
36
37; Display library functions
38struc DISPLAY_LIB
39 .PushDisplayContext:
40 .PopDisplayContext:
41 .InitializeDisplayContext resb 2
42
43 .SetCharacterPointerFromBXAX resb 2
44 .SetCharOutputFunctionFromAXwithAttribFlagInBL resb 2
45 .SetCharacterOutputParameterFromAX resb 2
46 .SetCharacterAttributeFromAL resb 2
47 .SetCursorShapeFromAX resb 2
48 .SetCursorCoordinatesFromAX resb 2
49 .SetNewPageFromAL resb 2
50 .SynchronizeDisplayContextToHardware resb 2
51
52 .GetCharacterPointerToBXAX resb 2
53 .GetSoftwareCoordinatesToAX resb 2
54 .GetColumnsToALandRowsToAH resb 2
55
56 .FormatNullTerminatedStringFromCSSI resb 2
57 .PrintSignedWordFromAXWithBaseInBX resb 2
58 .PrintWordFromAXwithBaseInBX resb 2
59 .PrintCharBufferFromBXSIwithLengthInCX resb 2
60 .PrintNullTerminatedStringFromBXSI resb 2
61 .PrintNullTerminatedStringFromCSSI resb 2
62 .PrintRepeatedCharacterFromALwithCountInCX resb 2
63 .PrintCharacterFromAL resb 2
64 .PrintNewlineCharacters resb 2
65 .ClearAreaWithHeightInAHandWidthInAL resb 2
66 .ClearScreen resb 2
67endstruc
68
69; Attribute flags for DISPLAY_LIB.SetCharacterOutputFunctionFromAXwithAttributeFlagInDL
70ATTRIBUTES_NOT_USED EQU 0
71ATTRIBUTES_ARE_USED EQU FLG_CONTEXT_ATTRIBUTES
72
73; Character output functions for DISPLAY_LIB.SetCharacterOutputFunctionFromAXwithAttributeFlagInDL
74TELETYPE_OUTPUT_WITH_ATTRIBUTE EQU DisplayCharOut_TeletypeOutputWithAttribute
75TELETYPE_OUTPUT_WITHOUT_ATTRIBUTE EQU DisplayCharOut_TeletypeOutput
76TELETYPE_OUTPUT_USING_BIOS EQU DisplayCharOut_BiosTeletypeOutput
77FAST_OUTPUT_WITH_ATTRIBUTE_ONLY EQU DisplayCharOut_Attribute
78FAST_OUTPUT_WITH_CHAR_ONLY EQU DisplayCharOut_Character
79FAST_OUTPUT_WITH_CHAR_AND_ATTRIBUTE EQU DisplayCharOut_CharacterWithAttribute
80BUFFER_OUTPUT_WITH_CHAR_ONLY EQU DisplayCharOut_WriteCharacterToBuffer
81
82DEFAULT_CHARACTER_OUTPUT EQU TELETYPE_OUTPUT_WITH_ATTRIBUTE
83
84
85struc VIDEO_BDA
86 resb 449h
87 .bMode resb 1 ; 0:449h, Video, Mode
88 .wColumns resb 2 ; 0:44Ah, Video, Number of columns
89 .wBytesPerPage resb 2 ; 0:44Ch, Video, Total number of bytes per page
90 .wPageOffset resb 2 ; 0:44Eh, Video, Current page offset
91 .rgwCursors resb 4 ; 0:450h, Video, Cursor position, pages 0...1
92 .displayContext resb 12 ; Our own display context (normally cursors for pages 2...7)
93 .wCursorShape resb 2 ; 0:460h, Video, Cursor shape
94 .bActivePage resb 1 ; 0:462h, Video, Active display page
95 .wVideoPort resb 2 ; 0:463h, Video, I/O Port number base
96 .bInternalModeReg resb 1 ; 0:465h, Video, Internal mode register
97 .bColorPalette resb 1 ; 0:466h, Video, Color palette
98endstruc
99
100struc DISPLAY_CONTEXT
101 .fpCursorPosition resb 4 ; Far pointer to cursor position in video memory
102 .fnCharOut resb 2 ; Function to draw character with
103 .wCharOutParam resb 2 ; User parameter for custom character output function
104 .wCursorShape resb 2 ; Current cursor shape
105 .bAttribute resb 1 ; Selected character attribute
106 .bFlags resb 1 ; Display context flags
107endstruc
108
109; Display context flags
110FLG_CONTEXT_ATTRIBUTES EQU (1<<0) ; Character output function uses attributes
111FLG_CONTEXT_CGA EQU (1<<1) ; CGA detected so prevent CGA snow
112
113
114; Text mode character attribute byte bits for CGA+ (color adapters)
115FLG_COLOR_FORE_BLUE EQU (1<<0)
116FLG_COLOR_FORE_GREEN EQU (1<<1)
117FLG_COLOR_FORE_RED EQU (1<<2)
118FLG_COLOR_FORE_INTENSITY EQU (1<<3)
119FLG_COLOR_FORE_FONT_B EQU (1<<3) ; Select font set B (if available, EGA+)
120FLG_COLOR_BACK_BLUE EQU (1<<4)
121FLG_COLOR_BACK_GREEN EQU (1<<5)
122FLG_COLOR_BACK_RED EQU (1<<6)
123FLG_COLOR_BACK_INTENSITY EQU (1<<7) ; Intensity when blinking is disabled
124FLG_COLOR_BLINK EQU (1<<7) ; Blinking color when enabled (enabled by default)
125
126; CGA colors
127%define COLOR_ATTRIBUTE(foreground, background) ( (foreground) | ((background)<<4) )
128COLOR_BLACK EQU 0
129COLOR_BLUE EQU 1
130COLOR_GREEN EQU 2
131COLOR_CYAN EQU 3
132COLOR_RED EQU 4
133COLOR_MAGENTA EQU 5
134COLOR_BROWN EQU 6
135COLOR_WHITE EQU 7 ; Last background color if blinking enabled
136COLOR_GRAY EQU 8
137COLOR_LIGHT_BLUE EQU 9
138COLOR_LIGHT_GREEN EQU 10
139COLOR_LIGHT_CYAN EQU 11
140COLOR_LIGHT_RED EQU 12
141COLOR_LIGHT_MAGENTA EQU 13
142COLOR_YELLOW EQU 14
143COLOR_BRIGHT_WHITE EQU 15
144
145
146; Text mode character attribute byte bits for MDA (monochrome adapters)
147; (attributes 00h, 08h, 80h, 88h, 70h, 78h, F0h and F8h are exceptions)
148FLG_MONO_UNDERLINE EQU (1<<1)
149FLG_MONO_INTENSITY EQU (1<<3)
150FLG_MONO_BLINK EQU (1<<7)
151
152; Text mode character attribute bytes for MDA/Hercules (monochrome adapters)
153; *Not displayed on some monitors
154MONO_HIDDEN EQU 00h ; Not displayed (same for 08h, 80h and 88h)
155MONO_UNDERLINE EQU 01h ; Underlined
156MONO_NORMAL EQU 07h ; Normal (white on black)
157MONO_BRIGHT_UNDERLINE EQU 09h ; High intensity, underlined
158MONO_BRIGHT EQU 0Fh ; High intensity
159MONO_REVERSE EQU 70h ; Reverse video (black on white)
160MONO_REVERSE_DARK EQU 78h ; (dark green on green)
161MONO_BLINK EQU 87h ; Blinking white on black*
162MONO_BRIGHT_BLINK EQU 8Fh ; Blinking high intensity*
163MONO_REVERSE_BLINK EQU 0F0h ; Blinking reverse video
164MONO_REVERSE_DARK_BLINK EQU 0F8h ; (blinking dark green on green)
165
166
167; Cursor position macro for DX register
168%define CURSOR_XY(x, y) ( (x) | ((y)<<8) )
169
170; Cursor shapes
171CURSOR_NORMAL EQU 0607h ; Two line cursor near or at the bottom of cell
172CURSOR_HIDDEN EQU 2000h
173
174
175; Display modes
176CGA_TEXT_MODE_BW40 EQU 0 ; Applications should use...
177CGA_TEXT_MODE_CO40 EQU 1
178CGA_TEXT_MODE_BW80 EQU 2 ; ..black, white and bright white attributes only
179CGA_TEXT_MODE_CO80 EQU 3
180MDA_TEXT_MODE EQU 7 ; Real monochrome attributes available
181
182
183; Display segments
184COLOR_TEXT_SEGMENT EQU 0B800h ; Text modes 0...3 (CGA+)
185MONO_TEXT_SEGMENT EQU 0B000h ; Text mode 7 (MDA, Hercules)
186
187OFFSET_TO_CGA_STATUS_REGISTER EQU 6 ; Base port 3D4h + 6 = 3DAh
188CGA_STATUS_REGISTER EQU 3DAh
189
190
191; Control characters for teletype output
192NULL EQU 00h
193SOH EQU 01h ; Start of heading
194STX EQU 02h ; Start of text
195BELL EQU 07h ; Bell
196BS EQU 08h ; Backspace
197TAB EQU 09h ; Horizontal TAB
198LF EQU 0Ah ; Line feed (newline)
199CR EQU 0Dh ; Carriage return
200ESC EQU 1Bh ; Escape
201
202; Non ASCII characters (code page 437)
203DOUBLE_TOP_RIGHT_CORNER EQU 187
204DOUBLE_TOP_LEFT_CORNER EQU 201
205DOUBLE_BOTTOM_RIGHT_CORNER EQU 188
206DOUBLE_BOTTOM_LEFT_CORNER EQU 200
207DOUBLE_VERTICAL EQU 186
208DOUBLE_HORIZONTAL EQU 205
209DOUBLE_VERTICAL_TO_RIGHT_SINGLE EQU 199
210DOUBLE_VERTICAL_TO_LEFT_SINGLE EQU 182
211DOUBLE_LEFT_HORIZONTAL_TO_SINGLE_VERTICAL EQU 181
212DOUBLE_RIGHT_HORIZONTAL_TO_SINGLE_VERTICAL EQU 198
213SINGLE_HORIZONTAL EQU 196
214SINGLE_LEFT_HORIZONTAL_TO_VERTICAL EQU 180
215SINGLE_RIGHT_HORIZONTAL_TO_VERTICAL EQU 195
216ANGLE_QUOTE_LEFT EQU 174
217ANGLE_QUOTE_RIGHT EQU 175
218BLOCK_MOSTLY_BACKGROUND EQU 176
219BLOCK_EVEN_BACKGROUND_AND_FOREGROUND EQU 177
220BLOCK_MOSTLY_FOREGROUND EQU 178
221BLOCK_FULL_FOREGROUND EQU 219
222
223
224; Background character for clearing screen
225%ifndef SCREEN_BACKGROUND_CHARACTER
226 %define SCREEN_BACKGROUND_CHARACTER BLOCK_MOSTLY_BACKGROUND
227%endif
228%ifndef SCREEN_BACKGROUND_ATTRIBUTE
229 %define SCREEN_BACKGROUND_ATTRIBUTE MONO_NORMAL
230%endif
231
232%endif ; DISPLAY_INC
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